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mosaic texture

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Image
Living Pectinaria koreni. Note the mosaic texture of tube (photograph by Hans Hillewaert).
Published: 01 October 2008
F igure 5. Living Pectinaria koreni . Note the mosaic texture of tube (photograph by Hans Hillewaert).
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The five textural combinations of pyrobitumen under nonpolarized, plane-polarized, and cross-polarized reflected light. (A) Finely mosaic- and spherical-textured pyrobitumen on a base of isotropic to slightly mosaic-textured pyrobitumen, with obvious boundaries between the textures (well GS109, 5311 m, fourth member of the Dengying Formation [Z2dy4]). (B and C) Same as (A) but under plane- and cross-polarized light. (D) Irregularly mosaic-textured pyrobitumen on a base of isotropic to slightly mosaic-textured pyrobitumen, with obvious boundaries between the textures (outcrop sample YB-11, Z2dy4). (E and F) Same as (D) but under plane- and cross-polarized light. (G) Concentric zoning with an interior of finely mosaic- and spherical-textured pyrobitumen on a base of isotropic to slightly mosaic-textured pyrobitumen, with obvious boundaries between the textures. The central zone consists of deformed spheres with a large diameter, and the exterior is irregularly mosaic-textured pyrobitumen on a base of isotropic to slightly mosaic-textured pyrobitumen, with obvious boundaries between the textures (well MX9, 5033 m, Z2dy4). (H and I) Same as (G) but under plane- and cross-polarized light. (J) Spherical- and fibrous-textured pyrobitumen. The spherical texture gradually transitions to the fibrous texture without obvious boundaries (well MX9, 5448 m, second member of the Dengying Formation [Z2dy2]). (K and L) Same as (J) but under plane- and cross-polarized light. (M) Concentric zoning with an interior of finely mosaic- and spherical-textured pyrobitumen on a base of isotropic to slightly mosaic-textured pyrobitumen. The exterior is fibrous–flow-textured pyrobitumen. There are obvious boundaries between the isotropic to slightly mosaic, finely mosaic, spherical, and fibrous textures, and no obvious boundaries between the fibrous and flow textures (well GS102, 5039 m, Z2dy4). (N and O) Same as (M) but under plane- and cross-polarized light.
Published: 01 July 2022
Figure 3. The five textural combinations of pyrobitumen under nonpolarized, plane-polarized, and cross-polarized reflected light. (A) Finely mosaic- and spherical-textured pyrobitumen on a base of isotropic to slightly mosaic-textured pyrobitumen, with obvious boundaries between the textures
Image
Deformation structures in the low-strain fault rock unit (LS). (A, B) Outcrop view of the footwall damage zones distant from the F1 fault core. Due to the low-fracture density, dolomite mosaic texture can be described. (C) The dolomicrite texture is mostly characterized by a mosaic with a polymodal crystal size distribution and euhedral crystal shapes. (D) Sparry dolomites, including the xenotropic pale-yellow saddle dolomites, and showing typical wavy extinction. (E) Hypodiotopic mosaic texture overprinting the other textures forming veins and vugs. (F) Scanning electron microscope microphotograph showing a homogeneous mineralogic composition of the different dolomite mosaic textures.
Published: 06 December 2024
Figure 8. Deformation structures in the low-strain fault rock unit (LS). (A, B) Outcrop view of the footwall damage zones distant from the F1 fault core. Due to the low-fracture density, dolomite mosaic texture can be described. (C) The dolomicrite texture is mostly characterized by a mosaic
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Frequency distributions of pyrobitumen reflectance for the six end-member pyrobitumen textures. (A) Isotropic to slightly mosaic-textured pyrobitumen. (B) Finely mosaic-textured pyrobitumen. (C) Irregularly mosaic-textured pyrobitumen. (D) Spherical-textured pyrobitumen. (E) Flow-textured pyrobitumen. (F) Fibrous-textured pyrobitumen. GS = Gaoshiti; MX = Moxi; W = Weiyuan; YB = Yangba; Z = Ziyang; ZS = Zishen; ZY = Zhengyuan.
Published: 01 July 2022
Figure 6. Frequency distributions of pyrobitumen reflectance for the six end-member pyrobitumen textures. (A) Isotropic to slightly mosaic-textured pyrobitumen. (B) Finely mosaic-textured pyrobitumen. (C) Irregularly mosaic-textured pyrobitumen. (D) Spherical-textured pyrobitumen. (E) Flow
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Atomic force microscopy images of the six end-member textures of pyrobitumen. (A) Isotropic to slightly mosaic-textured pyrobitumen (well MX10, 5466 m, second member of the Dengying Formation [Z2dy2]). (B) Finely mosaic-textured pyrobitumen (well ZS1, 5401 m, Z2dy2). (C) Irregularly mosaic-textured pyrobitumen (well W113, 3071 m, Z2dy2). (D) Spherical- and finely mosaic-textured pyrobitumen (well MX10, 5466 m, Z2dy2). (E) Flow-textured pyrobitumen (well MX10, 5466 m, Z2dy2). (F) Fibrous-textured pyrobitumen (GS7, 5261 m, fourth member of the Dengying Formation).
Published: 01 July 2022
Figure 5. Atomic force microscopy images of the six end-member textures of pyrobitumen. (A) Isotropic to slightly mosaic-textured pyrobitumen (well MX10, 5466 m, second member of the Dengying Formation [Z 2 dy 2 ]). (B) Finely mosaic-textured pyrobitumen (well ZS1, 5401 m, Z 2 dy 2 ). (C
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Raman spectra of the six end-member pyrobitumen textures. (A–C) Finely mosaic-textured and dark and bright areas of spherical-textured pyrobitumen (well GS109, 5311 m, fourth member of the Dengying Formation [Z2dy4]). (D–F) Isotropic to slightly mosaic-textured and dark and bright areas of irregularly mosaic-textured pyrobitumen (outcrop sample YB-11, Z2dy4). (G–I) Isotropic to slightly mosaic-, spherical-, flow-, and fibrous-textured pyrobitumen (well GS102, 5039 m, Z2dy4).
Published: 01 July 2022
Figure 7. Raman spectra of the six end-member pyrobitumen textures. (A–C) Finely mosaic-textured and dark and bright areas of spherical-textured pyrobitumen (well GS109, 5311 m, fourth member of the Dengying Formation [Z 2 dy 4 ]). (D–F) Isotropic to slightly mosaic-textured and dark and bright
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Plots of Raman parameters versus the random reflectance of pyrobitumen with different optical textures. (A) Plot of wave number of band D (WD) versus the random reflectance of isotropic to slightly mosaic- and finely mosaic-textured pyrobitumen. (B) Plot of Raman band separation (RBS) versus the random reflectance of isotropic to slightly mosaic- and finely mosaic-textured pyrobitumen. (C) Plot of full-width–at–half-maximum ratio of D and G peaks (FWHMD/FWHMG) versus the random reflectance of isotropic to slightly mosaic- and finely mosaic-textured pyrobitumen. (D) Plot of WD versus the random reflectance of irregularly mosaic-, spherical-, flow-, and fibrous-textured pyrobitumen. (E) Plot of RBS versus the random reflectance of irregularly mosaic-, spherical-, flow-, and fibrous-textured pyrobitumen. (F) Plot of FWHMD/FWHMG versus the random reflectance of irregularly mosaic-, spherical-, flow-, and fibrous-textured pyrobitumen. BRavg = average random reflectance; BRhr = average random reflectance of bright areas; BRlr = average random reflectance of dark areas; BRmax = maximum random reflectance; BRmin = minimum random reflectance; R2 = coefficient of determination.
Published: 01 July 2022
Figure 12. Plots of Raman parameters versus the random reflectance of pyrobitumen with different optical textures. (A) Plot of wave number of band D ( W D ) versus the random reflectance of isotropic to slightly mosaic- and finely mosaic-textured pyrobitumen. (B) Plot of Raman band separation
Journal Article
Journal: GSA Bulletin
Published: 01 July 1990
GSA Bulletin (1990) 102 (7): 877–888.
... is uniquely characterized by its petrographic properties. OM near mineral showings is characterized by mosaic textures,alteration rims, abnormal anisotropy, and retlectances (R o ) higher than background levels in the Beekmantown Group. OM near alkaline intrusions is characterized by rare mosaic textures...
Journal Article
Journal: AAPG Bulletin
Published: 01 July 2022
AAPG Bulletin (2022) 106 (7): 1373–1401.
...Figure 3. The five textural combinations of pyrobitumen under nonpolarized, plane-polarized, and cross-polarized reflected light. (A) Finely mosaic- and spherical-textured pyrobitumen on a base of isotropic to slightly mosaic-textured pyrobitumen, with obvious boundaries between the textures...
FIGURES
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Image
Scanning electron microscopy (SEM) images and corresponding photomicrographs under nonpolarized reflected light of textural end members or combinations. (A) SEM images of isotropic to slightly mosaic-textured pyrobitumen (well Z5, 3401 m, second member of the Dengying Formation [Z2dy2]). (B) Photomicrograph of (A). (C) SEM images of isotropic to slightly mosaic-, finely mosaic-, irregularly mosaic-, and spherical-textured pyrobitumen (well MX9, 5033 m, fourth member of the Dengying Formation [Z2dy4]). (D) Photomicrograph of (C). (E) SEM images of isotropic to slightly and irregularly mosaic-textured pyrobitumen (outcrop sample YB-11, Z2dy4). (F) SEM images of isotropic to slightly mosaic-, finely mosaic-, spherical-, flow-, and fibrous-textured pyrobitumen (well MX10, 5466 m, Z2dy2). (G) Photomicrograph of (F). (H) SEM images of finely mosaic- and spherical-textured pyrobitumen (well GS109, 5311 m, Z2dy4). (I) SEM images of spherical-textured pyrobitumen (well GS7, 5261 m, Z2dy4). (J) Enlarged view of (F) with isotropic to slightly mosaic-, finely mosaic-, spherical-, and flow-textured pyrobitumen (well MX10, 5466 m, Z2dy2). (K) SEM images of fibrous-textured pyrobitumen (well MX9, 5448 m, Z2dy2). (L) Photomicrograph of (K). EHT = extra-high tension; Mag = magnification.
Published: 01 July 2022
Figure 4. Scanning electron microscopy (SEM) images and corresponding photomicrographs under nonpolarized reflected light of textural end members or combinations. (A) SEM images of isotropic to slightly mosaic-textured pyrobitumen (well Z5, 3401 m, second member of the Dengying Formation [Z 2 dy
Image
Examples of cathodoluminescence (CL) textures in the different quartz-bearing veins and Ti contents obtained with electron microprobe analysis (EMPA). (A) Bright- to gray-CL quartz with mosaic texture intergrown with chalcopyrite in an A1 vein. (B) Bright-CL quartz with mosaic texture in contact with chalcopyrite, anhydrite, and quartz-K-feldspar aggregate in an A2 vein. (C) A3 vein with bright- to gray-CL quartz with euhedral zones that indicate growth from the wall rock toward the vein center. Chalcopyrite and bornite are found close to the wall rock and in contact with several CL growth zones, whereas anhydrite fills the vein center. Dark-CL cobwebs cut older quartz at top. (D) A4 veinlet showing three different generations of quartz: gray-CL mosaic texture at the left, a euhedral overgrowth of gray-CL to the right, and several younger zones of relatively homogeneous dark gray-CL quartz. Chalcopyrite is in contact with the three generations of CL quartz. (E) B vein with regularly growth-zoned gray-CL quartz, chalcopyrite, and late cobwebs of dark-CL quartz. Chalcopyrite precipitated on the contact between the quartz and wall rock. (F) Quartz-anhydrite-molybdenite (QAM) vein with gray-CL mosaic quartz is cut by dark gray-CL quartz. Anhydrite here and elsewhere is spatially associated with the dark gray-CL quartz. (G) Sugary, fine-grained mosaic-textured quartz in a magnetite veinlet. (H) C-type chalcopyrite-pyrite veinlet forming a narrow band of dark-CL quartz along its margins when crosscutting a B vein with gray-CL quartz. Abbreviation: wr = wall rock. See Table 1 for mineral abbreviations.
Published: 01 September 2024
Fig. 11. Examples of cathodoluminescence (CL) textures in the different quartz-bearing veins and Ti contents obtained with electron microprobe analysis (EMPA). (A) Bright- to gray-CL quartz with mosaic texture intergrown with chalcopyrite in an A1 vein. (B) Bright-CL quartz with mosaic texture
Journal Article
Journal: Economic Geology
Published: 01 March 2021
Economic Geology (2021) 116 (2): 407–425.
... are crustiform or brecciated in hand specimen, ore minerals exclusively occur within colloform quartz bands. High-magnification microscopy reveals that ore-bearing colloform bands consist of fine-grained quartz exhibiting relic microsphere textures and quartz having a mosaic texture that formed through...
FIGURES
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Journal Article
Published: 01 February 2005
The Canadian Mineralogist (2005) 43 (1): 463–478.
... forms a corona around green hercynite, with K-feldspar rimming the sapphirine. Reaction textures, annealing and polygonization indicate localized equilibration, with mosaic equilibrium preserved on the thin-section scale. Various geothermobarometers yield estimates of high temperatures (755–1260°C...
FIGURES
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Image
Six textural end members of pyrobitumen observed under nonpolarized, plane-polarized, and cross-polarized reflected light. (A) Isotropic to slightly mosaic-textured pyrobitumen under nonpolarized light (well Z5, 3401, second member of the Dengying Formation [Z2dy2]). (B and C) Same as (A) but under plane- and cross-polarized light. (D) Finely mosaic-textured pyrobitumen under nonpolarized light (well ZS1, 5401 m, Z2dy2). (E and F) Same as (D) but under plane- and cross-polarized light. (G) Irregularly mosaic-textured pyrobitumen under nonpolarized light (well W113, 3071, Z2dy2). (H and I) Same as (G) but under plane- and cross-polarized light. (J) Spherical-textured pyrobitumen under nonpolarized light (well GS7, 5261 m, fourth member of the Dengying Formation [Z2dy4]). (K and L) Same as (J) but under plane- and cross-polarized light. (M) Flow-textured pyrobitumen under nonpolarized light (well Z6, 3723 m, Z2dy2). (N and O) Same as (M) but under plane- and cross-polarized light. (P) Fibrous-textured pyrobitumen under nonpolarized light (well GS7, 5261 m, Z2dy4). (Q and R) Same as (P) but under plane- and cross-polarized light.
Published: 01 July 2022
Figure 2. Six textural end members of pyrobitumen observed under nonpolarized, plane-polarized, and cross-polarized reflected light. (A) Isotropic to slightly mosaic-textured pyrobitumen under nonpolarized light (well Z5, 3401, second member of the Dengying Formation [Z 2 dy 2 ]). (B and C) Same
Journal Article
Journal: Geology
Published: 01 November 1989
Geology (1989) 17 (11): 1040–1043.
... of microdeformation features or mosaic textures similar to those associated with known impact structures and the K/T boundary. We conclude that evidence of shock deformation in the Toba deposits has not been demonstrated. Geological Society of America 1989 ...
Image
Photomicrographs showing inclusions in garnet. Images a and b show euhedral prismatic inclusion 1 with palisade texture associated with rutile, in plane-polarized and cross-polarized light, respectively. Images c and d show inclusion 3 with mosaic texture. Radial fractures surrounding inclusions 1 and 3 are seen in a and c, respectively. For comparison, cross-polarized photomicrographs showing transitional textures from coesite to quartz are also shown: image e shows a coesite relic rimmed by quartz aggregate in eclogitic garnet with palisade texture (with gypsum plate); image f shows quartz pseudomorphs after coesite in eclogitic omphacite with mosaic texture. Both coesite-bearing samples are from the Dabie-Sulu terrane, China. (Color online.)
Published: 01 February 2009
F igure 3. Photomicrographs showing inclusions in garnet. Images a and b show euhedral prismatic inclusion 1 with palisade texture associated with rutile, in plane-polarized and cross-polarized light, respectively. Images c and d show inclusion 3 with mosaic texture. Radial fractures
Journal Article
Journal: GSA Bulletin
Published: 01 September 1978
GSA Bulletin (1978) 89 (9): 1424–1428.
... laminate, to hypidiomorphic-inequigranular, allotriomorphic-granular, and finally, recrystallized mosaic texture. Geological Society of America 1978 ...
Image
Variation of pyrobitumen reflectance with burial depth of the Dengying Formation in the Gaoshiti and Moxi areas, Sichuan Basin. (A) Random reflectance of isotropic to slightly mosaic-, finely mosaic-textured pyrobitumen. (B) Random reflectance of irregularly mosaic-, spherical-, flow-, and fibrous-textured pyrobitumen. (C) Maximum and minimum reflectance of irregularly mosaic-, spherical-, flow-, and fibrous-textured pyrobitumen. BRavg = average random reflectance; BRhr = average random reflectance of bright areas; BRlr = average random reflectance of dark areas; BRmax = maximum random reflectance; BRmin = minimum random reflectance; R2 = coefficient of determination.
Published: 01 July 2022
Figure 13. Variation of pyrobitumen reflectance with burial depth of the Dengying Formation in the Gaoshiti and Moxi areas, Sichuan Basin. (A) Random reflectance of isotropic to slightly mosaic-, finely mosaic-textured pyrobitumen. (B) Random reflectance of irregularly mosaic-, spherical-, flow
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Published: 01 August 2002
F ig . 4. Representative breccia textures at Robb Lake. A. Crackle texture. B. Mosaic texture. C. Rubble texture.
Journal Article
Journal: Clay Minerals
Published: 01 September 2013
Clay Minerals (2013) 48 (4): 563–582.
... the volume of individual particles, presenting a mosaic texture. Exfoliation is related to this mosaic distribution of the different mineral phases within the particles. Lateral phase boundaries between vermiculite and mica layers, or vermiculite and chlorite layers are postulated to prevent or impede...
FIGURES
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